Theory of Indicators
2
Theory of Indicators HInd (aq) H ⇌ + (aq) + Ind - (aq) Colour 1 Colour 2 K ind = [H + ][Ind - ]/[HInd] log 10 K ind = log 10 [H + ] + log 10 ([Ind - ]/[HInd]) -log 10 K ind = -log 10 [H + ] + -log 10 ([Ind - ]/[HInd]) pK Ind = pH – log 10 ([Ind - ]/[HInd]) log ([Ind - ]/[HInd]) = pH- pK
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Theory of Indicators. HInd (aq) ⇌ H + (aq) + Ind - (aq) Colour 1 Colour 2 K ind = [H + ][Ind - ]/[HInd] log 10 K ind = log 10 [H + ] + log 10 ([Ind - ]/[HInd]) -log 10 K ind = -log 10 [H + ] + -log 10 ([Ind - ]/[HInd]) pK Ind = pH – log 10 ([Ind - ]/[HInd]) - PowerPoint PPT Presentation
Transcript of Theory of Indicators
Theory of Indicators
HInd (aq) H⇌ + (aq) + Ind- (aq)
Colour 1 Colour 2
Kind = [H+][Ind-]/[HInd]
log10 Kind = log10 [H+] + log10 ([Ind-]/[HInd])
-log10 Kind = -log10 [H+] + -log10 ([Ind-]/[HInd])
pKInd = pH – log10 ([Ind-]/[HInd])
log10 ([Ind-]/[HInd]) = pH- pKInd
Theory of Buffers
HA (aq) H⇌ + (aq) + A- (aq)
KA = [H+][A-]/[HA]
log10 KA = log10 [H+] + log10 ([A-]/[HA])
-log10 KA = -log10 [H+] + -log10 ([A-]/[HA])
pKA = pH – log10 ([A-]/[HA])
pH = pKA- log10 ([HA]/[A-])
